Machine element.



No. 775,735. PATENTED NOV. 22,1904.

0. DE L. RIOE.

MACHINE ELEMENT.

APPLICATION FILED FEB. 11, 1904.

N0 MODEL.

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1 g. 2. i 1" i i i I l j gung :IIIIIIIIIIIIIIKMIMIIM Wm essay:1770877507 lflllllllllllh a/wze J Z1 75506) UNITED STATES latentedNovember 22, 1904.

CHARLES DE LOS RICE, OF HARTFORD, CONNECTICUT.

MACHINE ELEMENT.

SPECIFICATION forming part of Letters Patent N 0. 775,735, datedNovember 22, 1904.

Application filed February 11, 1904. Serial No. 193,139. (No model.)

To all w/wm, it may concern:

Be it known that I, CHARLEs DE Los RICE, a citizen of the United Statesof America, residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inMachine Elements, of which the following is a specification.

This invention relates to the class of devices commonly known as keys,feathers, &c., by .means of which a pulley or similar element isconnected with a shaft to drive it rotarily; and the object of theinvention is to produce a device of this kind having features of noveltyand advantage.

The invention is adapted for a great variety of uses, but is shown anddescribedrherein as applied to drill-press construction to-connect thespindle with its pulley.

In the drawings, Figure 1 is a side elevation showing the frame andpulley in central vertical section. Fig. 2 is a plan view of the key andthe spindle.

Referring to the drawings, a is a spindle cut away on each side, formingthe oppositely-' disposed shoulders b.

' c is the pulley, in the upper end of which is secured the plate cl,having a central opening (Z and studs d which project into said opening,said studs preferably having a driving fit in suitable apertures in theplate. On the ends of these studs are rotatably mounted rollers e, whichare of sufficient diameter and so arranged that their peripheries engagethe oppositely-disposed shoulders Z) on the spindle. The axes of thestuds on which the rollers are mounted are parallel to the plane ofcontact between the rollers and the spindle. During the working feed ofthe spindle the driving effect of the rollers is on the radialshoulders,

and the strain on the rollers is in adirect line.

with their rotary support.

It results from this construction and arrangement of the parts that allcramping of line of contact between the rollers and said radialshoulders, substantially as described.

2. In combination a shaft, a pulley mounted thereon, said shaft beingmovable lengthwise through said pulley and having oppositelydisposedradial shoulders extending lengthwise thereof, and rollers suitablysupported by said pulley and having peripheral contact with said radialshoulders, the axes of said rollers being parallel to the line ofcontact of the rollers with said radial shoulders.

3. In combination a shaft, a pulley mounted thereon, said shaft beingmovable lengthwise through said pulley and having oppositelydisposedradial shoulders extending lengthwise thereof, studs-carried by saidpulleys, and rollers rotatably mounted on said studsand havingperipheral contact with said radial shoulders, the axes of said studsbeing parallel to the line of contact of the rollers with said radialshoulders, 4. The combination with the spindle having radial shouldersand a pulley through which said spindle is free to move lengthwise, of aplate carried by said pulley, studs mounted in said plate with theiraxes substantially parallel to the radial shoulders on the spindle, androllers rotatably mounted at the ends of the studs and having peripheralengagement with the radial shoulders on said spindle, substantially asdescribed.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES DE LOS RICE. Witnesses:

H. E. HART,

D. I. KREIMENDAHL.

